bug fix the prompt when asking to document a model for the first time

bug fix the prompt when asking to document a model for the first time: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). / / / / / / / \/ / / / / / / / / / / / / / / / / / / ( ) / / / / / / / / / / \ , / . /\ / / /\ , /\ , /\ , / / / /